FUNCTIONALITY DESCRIPTION - TIME PERIOD COMPARISON
The time period comparison functionality enables analysis of changes in business results by comparing data from the current period with the analogous previous period. The system automatically calculates comparative values for all metrics, providing a complete picture of trends and performance changes.
COMPARISON LOGIC
Automatic selection of comparative periods:
The system automatically matches the comparative period to the selected time range:
Last 7 days → comparison with previous 7 days
Last 30 days → comparison with previous 30 days
Last 90 days → comparison with previous 90 days
This month → comparison with previous month
Custom range → comparison with a period of identical length directly preceding the selected range
Universal application:
Period comparisons work identically for all types of metrics: sales, advertising, quantitative, and value-based.
AVAILABLE TYPES OF COMPARATIVE DATA
Current Period
The metric value achieved in the currently analyzed time period. This is the basic value that is always visible in every data view.
Previous Period
The metric value achieved in the analogous previous period. Data is visible after checking the "Show Previous Period" option in the user interface.
Change (Value) - Value change
The difference between the current and previous period values, expressed in the original metric units. Calculated using the formula: Current Period - Previous Period.
Interpretation examples:
20 impressions = increase of 20 impressions (positive value indicates growth)
-15 orders = decrease of 15 orders (negative value indicates decline)
150 PLN = revenue increase of 150 PLN (positive value indicates growth)
Change (%) - Percentage change
Percentage change in value between current and previous period. Calculated using the formula: (Current Period - Previous Period) / Previous Period × 100%.
Special case: When the Previous Period value is 0 and Current Period is greater than 0, the system automatically displays 100% growth, regardless of the actual current value.
USER INTERFACE
Default display settings:
The application displays by default only:
Current Period - value from the current period
Change (%) - percentage change
Additional display options:
In the upper left corner of each data view, two checkboxes are available:
"Show Previous Period" - When checked, displays an additional column with values from the previous period, enabling direct number comparison.
"Show Change Values" - When checked, displays an additional column with value change, showing the exact difference between periods in original metric units.
Complete comparative view:
After checking both options, the user sees a complete set of comparative data:
Current Period | Previous Period | Change (Value) | Change (%)
PRACTICAL APPLICATION EXAMPLES
Growth and decline analysis:
Scenario: Ad impressions in Current Period: 100, Previous Period: 80
Change (Value): 20 impressions (growth)
Change (%): 25% (growth)
Conclusion: 25% increase in product interest
Identifying new opportunities:
Scenario: Product sales in Current Period: 15, Previous Period: 0
Change (Value): 15 units (growth)
Change (%): 100% (growth)
Conclusion: New product started generating sales
Problem detection:
Scenario: Revenue in Current Period: 1200 PLN, Previous Period: 1800 PLN
Change (Value): -600 PLN
Change (%): -33%
Conclusion: Significant revenue decline requiring cause analysis
APPLICATION IN DIFFERENT CONTEXTS
E-commerce data (Shopify, IdoSell):
Comparing sales of products, brands, and categories
Analyzing changes in order and customer numbers
Tracking revenue trends
Advertising data (Allegro Ads, Google Ads):
Monitoring campaign performance over time
Analyzing changes in costs and conversions
Optimizing budgets based on trends
Time data (Daily, Weekly, Monthly):
Identifying seasonal patterns
Detecting performance anomalies
Strategic planning based on historical trends
RESULT INTERPRETATION
Positive changes (positive values):
Growth in sales, traffic, conversions
Campaign performance improvement
Business development in analyzed area
Negative changes (negative values):
Result decline requiring attention
Possible problems to solve
Areas requiring optimization
No changes (zero values):
Result stability
No growth or decline trends
Potential need for development actions
The time period comparison functionality is a key analytical tool enabling informed business decisions based on historical data and development trends.